JP3373186B2 - Floorboard - Google Patents

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a floorboard.

[0002]

2. Description of the Related Art Conventionally, various wooden materials are used as a substrate, and the surface thereof is given an arbitrary make-up, and a real part consisting of a male and a female is formed on the substrate for fitting adjacent floor boards to each other. A floorboard formed on the four edges is provided.

Such a floorboard is constructed by striking fasteners such as nails and finish nails from above the male seeds, and constructing it on floor foundations such as joists, floor foundation boards and concrete slabs.
It constitutes the floor of the room.

[0004]

[Problems to be Solved by the Invention] Since the room after the floorboard has been installed is generally used as a living room, various electric appliances such as furniture, pianos, TVs and other heavy objects are placed on the floor. The floorboard is subject to the load of these heavy objects for a long period of time.

On the other hand, the male part of the real part of the floorboard is cut away from the upper and lower layers of the substrate edge to form the convex part, and the female part is formed from the middle layer of the substrate edge to form the concave part. Since the part is cut off and the edge of the board is partly cut off in the thickness direction in any case, its strength is weaker than other parts, and it is easily broken when subjected to a large load or strong impact. It is a thing.

For this reason, when the above-mentioned heavy object is placed directly above the floor plate joining portion due to the fitting of the male and female fruits, the real part is destroyed under the load and the floor plate is fixed. Sometimes the nails couldn't be removed and the floorboard lifted, causing ringing and unevenness.

[0007]

SUMMARY OF THE INVENTION Therefore, the present invention solves the above problems in the prior art, and provides a floor board excellent in strength in which the actual part is not broken or damaged even if it receives a load of a heavy object for a long period of time. The purpose is to provide.

In order to achieve this object, according to the present invention, the surface of the substrate is given an arbitrary make-up, and the four peripheral edges thereof are formed with a real portion made of male and female fruits having shapes fittable with each other. In the floorboard consisting of, hard layers having a higher specific gravity than the center portion in the thickness direction are formed on the front and back sides, and the center portion in the thickness direction is formed on the surface of the middle-layer wood fiberboard whose average specific gravity is 0.4 to 1.0. A hard layer having a higher specific gravity is formed on the front and back sides, and the average specific gravity thereof is higher than the average specific gravity of the middle-layer wooden fiber board and is 0.6 to 1.4. A back-layer wood board is attached to the back surface of the board, and the above-mentioned substrate is composed of three layers of these surface-layer wood fiber board, middle-layer wood fiber board and back-layer wood board, and the upper surface of the male is , The hard layer on the back side of the surface wood fiberboard and the middle
The hard layers on the front side of the multi-layer wood fiberboard are covered in a laminated state.
The bottom side of the above male is the back side of the middle-layer wood fiberboard.
The hard layer is exposed .

According to a preferred embodiment of the present invention, the back hard layer of the middle-layer wood fiberboard is exposed on the lower surface of the male fruit.

According to another preferred embodiment of the present invention, a wood fiberboard having a hard layer having a higher specific gravity than the central portion in the thickness direction is used as the backing wood board. In this case, more preferably, either the back side hard layer of the middle-layer wood fiber board or the front side hard layer of the back wood fiber board is exposed on the lower surface of the male fruit. Further, it is preferable that the back side hard layer of the surface wood fiber board is exposed on the upper surface of the female seed and / or the front side hard layer of the back wood fiber board is exposed on the lower surface of the female seed.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION A floorboard according to an embodiment of the present invention will be described below with reference to FIGS. 1 and 2.
This floor board 1 has a substrate formed by laminating a surface layer wood fiber board 1, a middle layer wood fiber board 2 and a back layer wood board 3 in this order from the front side.

Surface wood fiberboard 1 and middle wood fiberboard 2
The wood fiberboard that composes is defibrated from pine, cedar, cypress and other softwood or hardwood such as Lauan, Kapole, chestnut and poplar, as well as house or lumber waste, and adheres to the resulting wood fiber. It is obtained by pressure-bonding after adding an agent and forming. Since such a wood fiber board has a very small dimensional change rate of 0.03 to 0.04% per 1% of water content, it has excellent dimensional stability.

The wood fiberboard has hard layers on the front and back.
That is, the hard layers 1a, 1 are provided on the front and back of the surface wood fiberboard 1.
b, and hard layers 2a, 2b on the front and back of the middle-layer wood fiberboard.
have. The specific gravity of these hard layers is higher than that of the central portion in the thickness direction, and the layer thickness is about 0.3 to 3 mm. Since the hard layers having high specific gravity and excellent tensile strength and compressive strength are provided on the front and back of the wood fiberboard, the bending strength is excellent, and the amount of deflection due to a unit load is very small. It also has excellent scratch resistance and surface smoothness.

Regarding the average specific gravity of the whole wood fiberboard, the average specific gravity of the middle-layer wood fiberboard 2 is within the range of 0.4 to 1.0, and the average specific gravity of the surface layer wood fiberboard 1 is the middle-layer wood fiberboard 2
Is larger than the average specific gravity and is in the range of 0.6 to 1.4.

By making the average specific gravity of the surface wood fiber board 1 larger than the average specific gravity of the middle wood fiber board 2 as described above, the surface wood board 1 which is more excellent in strength is positioned on the substrate surface, and bending is achieved. It is possible to improve strength and surface hardness.

Regarding the specific gravity of the hard layer, the specific gravity of the front and back hard layers 2a, 2b of the middle-layer wood fiber board 2 is 0.8 to 1.4, and the specific gravity of the front and back hard layers 1a, 1b of the front wood fiber board 1 is. It is 0.9 to 1.6. If the specific gravity of the hard layer of each wood fiber board is less than the above lower limit, sufficient tensile strength or compressive strength cannot be obtained, and if it is greater than the above upper limit, the impact resistance decreases and becomes a brittle layer. As a result, problems such as cracking when exposed to impact occur.

The back-layer wood board 3 which constitutes the back layer of the floor board is made of solid wood, plywood, laminated veneer, particle board, wood fiber board, laminated wood and other arbitrary wood boards.

The surface-layer wood fiber board 1, the middle-layer wood fiber board 2 and the back-layer wood fiber board 3 are laminated and adhered via an optional adhesive to form a floor board. The surface side hard layer 1a of the surface wood fiber board 1 is exposed on the surface of this floor board substrate, and inside the floor board board, the back surface side hard layer 1b of the surface wood fiber board 1 and the middle layer wood fiber board 2 are exposed. The front side hard layer 2a is adjacent to the two layers to form a thick hard layer, and the back side hard layer 2b of the middle-layer wood fiberboard 2 is internally provided.

A decorative layer (not shown) is formed on the surface of the substrate. For example, a natural wood veneer or an artificial veneer on the surface of the substrate, or a veneer sheet backed by a sheet material such as non-woven fabric, paper or synthetic resin sheet on the veneer, or decorative sheet such as decorative paper, decorative synthetic resin sheet or film You can put on and apply makeup. The surface of the attached decorative sheet may be further coated. Alternatively, makeup may be applied by pattern printing.

[0020] The four sides edges of the substrate, as is known, but the real part is formed consisting of Omi 4 and Mesumi 5 fittable shapes, in the present invention, the upper surface of Omi 4 Surface wood fiber
Front side of the hard layer 1b on the back side of the fiberboard 1 and the middle-layer wood fiberboard 2
The surface-side hard layer 2a is provided in a laminated state . And a surface layer wood fiber board 1 Omi 4 and Mesumi 5 thick plus the thickness of the back side hard layer 1b is formed on the entire thickness of the Figure 1 in the middle layer wood fiber board 2, the surface layer wood fiber board The rear hard layer 1b of No. 1 is exposed on the upper surface of the male seed 4.

By thus exposing the hard layer on the upper surface of the male fruit, the male fruit, which is insufficient in strength due to its thin thickness, is reinforced, and the male fruit is subjected to impact and load. At times, it is possible to prevent the male fruit from being damaged or destroyed. Further, it is excellent in the function of preventing damage when nails are driven into the floor board during construction and firmly holding the driven nails with a hard layer having a high specific gravity.

According to a preferred embodiment of the present invention, male seed 4
The hard layer is also exposed on the lower surface of the. In FIG. 1, the backside hard layer 2 b of the middle-layer wood fiberboard 2 is exposed on the lower surface of the male seed 4. By exposing the hard layers on the upper and lower surfaces of the male seed 4 in this way, the reinforcing effect on the male seed is more remarkably exhibited, and the nails that have been driven in are held by the two hard layers that are spaced apart from each other. Therefore, the nail holding power becomes extremely large.

Further in accordance with a preferred embodiment of the present invention,
Hard layers are also exposed on the upper and lower surfaces of the female seed 5. For example, in FIG. 1, since the male seeds 4 and the female seeds 5 are formed by utilizing the entire thickness of the middle-layer wooden fiber board 2 as described above, the back hard layer 1b of the surface layer wooden fiber board 1 is made of the female seeds 5. It is exposed on the top surface. This also strengthens the female fruit, preventing damage to the female fruit even when the male fruit moves vertically due to the impact applied to the floor plate and collides with the inner surface of the female fruit fitted with the male fruit. can do.

A wood fiberboard having hard layers on the front and back can also be used as the back layer wood board 3. In this case, the hard layer is also arranged on the outermost back surface of the floor board. Surface side hard layer 1a of surface wood fiberboard 1 arranged on the surface
Combined with this, it is possible to greatly improve the bending strength of the floorboard, and to suppress the expansion and contraction due to the change in water content, and to provide extremely excellent dimensional stability.

A structural example of the embodiment in this case is shown in FIG. 2 , in which the surface layer wood fiber board 1, the middle layer wood fiber board 2 and the back layer wood fiber board 3 are laminated and adhered in this order from the front side to form a floor board substrate. I am configuring.

In FIG . 2 , the total thickness of the middle-layer wood fiber board 2 plus the thickness of the back hard layer 1b of the front wood fiber board 1 and the thickness of the back hard fiber board 3 of the back wood fiber board 3 Hero 4
And the female seeds 5 are formed, the back hard layer 1b of the surface wood fiber board 1 is on the upper surface of the male seed 4, and the front hard layer 3a of the back wood fiber board 3 is on the lower surface of the male seed 4, respectively. It is exposed and reinforces the male 4 and enhances the nail holding power.

[0027]

The back-layer wood fiberboard 3 ′ preferably has substantially the same specific gravity and thickness as the front-layer wood fiberboard 1, that is, the same wood fiberboard is used as the front-layer wood fiberboard 1 and the back-layer wood fiberboard 3 ′. It is preferable to use As a result, the front and back layers of the floorboard substrate have the same mechanical properties and dimensional changes, so that the front and back layers are bound to each other and are in a well-balanced state, and the occurrence of warpage due to dimensional changes can be prevented.

According to such an embodiment, the surface side hard layer 1a of the surface wood fiber board 1 is exposed on the surface of the floor board substrate, and inside the floor board substrate, the adjacent surface wood fiber board 1 is exposed. Backside hard layer 1b and middle-layer wood fiberboard 2
And a front side hard layer 2a of the intermediate wood fiber board 2 and a front side hard layer 3a of the back wood fiber board 3 ', which are adjacent to each other. A thick hard layer is internally provided, and the back side hard layer 3b of the back layer wood fiber board 3'is exposed on the back side of the floor board substrate.
According to such a construction of the floor board substrate, the bending strength is further increased, the front and back balance is good, and the dimensional stability is very excellent.

[0030]

As described above, according to the floorboard of the present invention, the upper surface of the male fruit formed on the edge of the floorboard substrate is provided on the back surface side of the surface wood fiber board or the front surface side of the middle wood fiber board. Since either hard layer is exposed and the male part is sufficiently reinforced by this, damage or destruction of the male due to driving nails or finish nails etc. during floorboard construction is prevented, fixing the floorboard And the workability is improved.

The floor board substrate of the present invention is formed by laminating a surface layer wood fiber board, a middle layer wood fiber board and a back layer wood board in this order from the surface side. The surface layer wood fiber board and the middle layer wood fiber board respectively have hard layers on the front and back sides. Since it has, the surface side hard layer of the surface wood fiberboard is exposed on the substrate surface, and in the interior of the floorboard substrate, the backside hard layer of the surface wood fiberboard and the surface of the middle-layer wood fiberboard The hard layer is adjacent to the side hard layer to form a thick hard layer with these two layers, and the back side hard layer of the middle-layer wood fiberboard is internally present, and mechanical strength is provided by these at least three hard layers. It is an extremely excellent substrate.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a floorboard according to an embodiment of the present invention.

FIG. 2 is a sectional view showing a floorboard according to another embodiment of the present invention.

[Explanation of symbols]

1 surface layer wood fiber board 1a front side hard layer 1b back side hard layer 2 middle layer wood fiber board 2a front side hard layer 2b back side hard layer 3 back layer wood board (back layer wood fiber board) 3a front side hard layer 3b back side Hard layer 4 Male fruit 5 Female fruit

Claims (3)

(57) [Claims] 1. A floorboard in which a surface of a substrate is given an arbitrary make-up, and a real part composed of a male fruit and a female fruit of a shape that can be fitted to each other is formed on its four peripheral edges, in the thickness direction center. Hard layers having a higher specific gravity than the central part are formed on the front and back sides, and the hard layers having a higher specific gravity than the central portion in the thickness direction are formed on the front and back sides on the surface of the middle-layer wood fiberboard whose average specific gravity is 0.4 to 1.0 And the average specific gravity of which is higher than the average specific gravity of the middle-layer wooden fiber board and is 0.6 to 1.4, and a back-layer wooden board is attached to the back surface of the middle-layer wooden fiber board. Is adhered, the above-mentioned substrate is composed of three layers of these surface wood fiberboard, middle-layer wood fiberboard and backwood wood board, and the upper surface of the male is the backside of the surface wood fiberboard.
Of the hard layer and the hard layer on the surface side of the middle-layer wood fiberboard were laminated.
It is covered in the state, and the lower surface of the above-mentioned male is on the middle layer of wood fiber board.
A floorboard in which the hard layer on the back side is exposed . 2. The back-layer wood board as the center in the thickness direction
Wood fiberboard with hard layers with higher specific gravity than the front and back
The floorboard according to claim 1, which is used. 3. The back surface of the middle-layer wood fiberboard on the bottom surface of the male fruit
Either the hard layer or the backside hard layer of the wood fiberboard
Is exposed,
Floorboard.